Which of the Following Accurately Describes the Speech of the Preschool

Which of the following accurately describes the speech of the preschool child?

A) Dysfluency in speech patterns is normal.
B) Sentence structure and grammatic usage are limited.
C) By age 5 years, child can be expected to have a vocabulary of about 1000 words.
D) Rate of vocabulary acquisition keeps pace with the degree of comprehension of speech.